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1 files changed, 180 insertions, 0 deletions

diff --git a/src/config.cpp b/src/config.cpp
new file mode 100644
index 0000000..22ea4aa
--- /dev/null
+++ b/src/config.cpp
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+#include <sys/stat.h>
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "config.h"
+
+const char DEFAULT_CONFIG[] =
+  "# fhvkov - forza horizon overlay (vulkan layer)\n"
+  "# positions and sizes are fractions of the game window;\n"
+  "# _x/_y are gauge centers. this file is re-read every second,\n"
+  "# so you can edit and save while driving.\n"
+  "port=9999\n"
+  "units=kmh\n"
+  "keep=0\n"
+  "scale=1.0\n"
+  "# needle motion blur: seconds of smear (try 0.06-0.15), 0 = off\n"
+  "blur=0.10\n"
+  "\n"
+  "tach_x=0.878\n"
+  "tach_y=0.830\n"
+  "tach_r=0.130\n"
+  "flash_needle=1\n"
+  "# whether to scale max rpm based on rpm reached by car\n"
+  "autoscale_rpm=1\n"
+  "# offset from max rpm at which needle starts flashing red\n"
+  "rpm_off=800.0\n"
+  "\n"
+  "show_boost=1\n"
+  "boost_x=0.775\n"
+  "boost_y=0.907\n"
+  "boost_r=0.060\n"
+  "\n"
+  "# lamps: abs, tcs (wheel slip) and tcs launch-control flash\n"
+  "show_abs=1\n"
+  "show_tcs=0\n"
+  "# enabling LC shows the \"tcs\" lamp\n"
+  "show_lc=1\n"
+  "show_tires=1\n"
+  "tire_x=0.970\n"
+  "tire_y=0.710\n"
+  "tire_sc=1.0\n";
+
+void config_defaults( CONFIG* c ) {
+  c->port  = 9999;
+  c->units = 0;
+  c->keep  = 0;
+  c->tach_x = 0.878; c->tach_y = 0.830; c->tach_r = 0.130;
+  c->scale = 1.0;
+  c->blur  = 0.10;
+  c->show_boost = 1;
+  c->boost_x = 0.775; c->boost_y = 0.907; c->boost_r = 0.060;
+  c->show_abs = 1; c->show_tcs = 1; c->show_lc = 1;
+  c->show_tires = 1;
+  c->tire_x = 0.97; c->tire_y = 0.71, c->tire_sc = 1.0;
+  c->flash_needle = 1;
+  c->autoscale_rpm = 1;
+  c->rpm_off = 800.0;
+}
+
+void config_resolve_path( CONFIG* c ) {
+  const char* env = getenv( "FHRPM_CONFIG" );
+  if( env ) {
+    snprintf( c->path, sizeof( c->path ), "%s", env );
+    return;
+  }
+  const char* home = getenv( "HOME" );
+  if( !home )
+    home = ".";
+  snprintf( c->path, sizeof( c->path ), "%s/.config/fhvkov/fhvkov.conf", home );
+}
+
+void config_write_default( const CONFIG* c ) {
+  char dir[512];
+  const char* home = getenv( "HOME" );
+  if( home ) {
+    snprintf( dir, sizeof( dir ), "%s/.config", home );
+    mkdir( dir, 0755 );
+    snprintf( dir, sizeof( dir ), "%s/.config/fhvkov", home );
+    mkdir( dir, 0755 );
+  }
+
+  FILE* f = fopen( c->path, "w" );
+  if( !f )
+    return;
+  defer( fclose( f ) );
+
+  fwrite( DEFAULT_CONFIG, 1, sizeof( DEFAULT_CONFIG ) - 1, f );
+  dlog( "fhvkov: wrote default config to %s\n", c->path );
+}
+
+void config_parse_line( CONFIG* c, char* key, char* val ) {
+  if(      !strcmp( key, "port" ) )          c->port = atoi( val );
+  else if( !strcmp( key, "units" ) )         c->units = !strcmp( val, "mph" );
+  else if( !strcmp( key, "keep" ) )          c->keep = atoi( val );
+  else if( !strcmp( key, "tach_x" ) )        c->tach_x = atof( val );
+  else if( !strcmp( key, "tach_y" ) )        c->tach_y = atof( val );
+  else if( !strcmp( key, "tach_r" ) )        c->tach_r = atof( val );
+  else if( !strcmp( key, "show_boost" ) )    c->show_boost = atoi( val );
+  else if( !strcmp( key, "boost_x" ) )       c->boost_x = atof( val );
+  else if( !strcmp( key, "boost_y" ) )       c->boost_y = atof( val );
+  else if( !strcmp( key, "boost_r" ) )       c->boost_r = atof( val );
+  else if( !strcmp( key, "scale" ) )         c->scale = atof( val );
+  else if( !strcmp( key, "blur" ) )          c->blur = atof( val );
+  else if( !strcmp( key, "show_abs" ) )      c->show_abs = atoi( val );
+  else if( !strcmp( key, "show_tcs" ) )      c->show_tcs = atoi( val );
+  else if( !strcmp( key, "show_lc" ) )       c->show_lc = atoi( val );
+  else if( !strcmp( key, "show_tires" ) )    c->show_tires = atoi( val );
+  else if( !strcmp( key, "tire_x" ) )        c->tire_x = atof( val );
+  else if( !strcmp( key, "tire_y" ) )        c->tire_y = atof( val );
+  else if( !strcmp( key, "tire_sc" ) )       c->tire_sc = atof( val );
+  else if( !strcmp( key, "flash_needle" ) )  c->flash_needle = atoi( val );
+  else if( !strcmp( key, "autoscale_rpm" ) ) c->autoscale_rpm = atoi( val );
+  else if( !strcmp( key, "rpm_off" ) )       c->rpm_off = atof( val );
+}
+
+STAT config_load( CONFIG* c ) {
+  FILE* f = fopen( c->path, "r" );
+  if( !f )
+    return STAT_ERR;
+  defer( fclose( f ) );
+
+  char line[256];
+  while( fgets( line, sizeof( line ), f ) ) {
+    char* p = line;
+    while( *p == ' ' || *p == '\t' )
+      p++;
+    if( *p == '#' || *p == '\n' ||* p == 0 )
+      continue;
+
+    char* eq = strchr( p, '=' );
+    if( !eq )
+      continue;
+    *eq = 0;
+
+    char* key = p, *val = eq + 1;
+    char* nl = strchr( val, '\n' );
+    if( nl )
+      *nl = 0;
+    char* e = key + strlen( key );
+    while( e > key && ( e[-1] == ' ' || e[-1] == '\t' ) )
+      *--e = 0;
+
+    config_parse_line( c, key, val );
+  }
+
+  struct stat st;
+  if( stat( c->path, &st ) == 0 )
+    c->mtime = st.st_mtime;
+  return STAT_OK;
+}
+
+void config_init( CONFIG* c ) {
+  config_defaults( c );
+  config_resolve_path( c );
+  if( !OK( config_load( c ) ) ) {
+    config_write_default( c );
+    config_load( c );
+  }
+}
+
+U8 config_poll( CONFIG* c ) {
+  struct stat st;
+  if( stat( c->path, &st ) != 0 )
+    return 0;
+  if( st.st_mtime == c->mtime )
+    return 0;
+
+  CONFIG fresh;
+  config_defaults( &fresh );
+  memcpy( fresh.path, c->path, sizeof( fresh.path ) );
+  if( !OK( config_load( &fresh ) ) )
+    return 0;
+
+  fresh.port = c->port;
+  *c = fresh;
+  dlog( "fhvkov: config reloaded\n" );
+  return 1;
+}